EP2533907B1 - System for coating, in particular painting, objects, in particular vehicle bodies - Google Patents

System for coating, in particular painting, objects, in particular vehicle bodies Download PDF

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Publication number
EP2533907B1
EP2533907B1 EP11703385.2A EP11703385A EP2533907B1 EP 2533907 B1 EP2533907 B1 EP 2533907B1 EP 11703385 A EP11703385 A EP 11703385A EP 2533907 B1 EP2533907 B1 EP 2533907B1
Authority
EP
European Patent Office
Prior art keywords
separating
electrode
lower edges
air
plates
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP11703385.2A
Other languages
German (de)
French (fr)
Other versions
EP2533907A1 (en
Inventor
Kersten Link
Werner Schuster
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Eisenmann SE
Original Assignee
Eisenmann SE
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Filing date
Publication date
Application filed by Eisenmann SE filed Critical Eisenmann SE
Publication of EP2533907A1 publication Critical patent/EP2533907A1/en
Application granted granted Critical
Publication of EP2533907B1 publication Critical patent/EP2533907B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/42—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths using electrostatic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/04—Plant or installations having external electricity supply dry type
    • B03C3/08—Plant or installations having external electricity supply dry type characterised by presence of stationary flat electrodes arranged with their flat surfaces parallel to the gas stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/02—Plant or installations having external electricity supply
    • B03C3/16—Plant or installations having external electricity supply wet type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/53—Liquid, or liquid-film, electrodes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
    • B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
    • B05B14/46—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by washing the air charged with excess material
    • B05B14/468—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths by washing the air charged with excess material with scrubbing means arranged below the booth floor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C2201/00—Details of magnetic or electrostatic separation
    • B03C2201/04—Ionising electrode being a wire
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/40—Electrode constructions
    • B03C3/45—Collecting-electrodes
    • B03C3/47—Collecting-electrodes flat, e.g. plates, discs, gratings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/74—Cleaning the electrodes
    • B03C3/78—Cleaning the electrodes by washing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S55/00—Gas separation
    • Y10S55/46—Spray booths

Definitions

  • the invention relates to a system for coating objects according to the preamble of patent claim 1.
  • a partial flow of the paint which generally contains both solid and solvent and / or binder does not reach the object.
  • This partial flow is called "overspray" in the professional world.
  • the overspray is detected by the air flow in the coating booth and fed to a separation, so that the air can optionally be returned to the coating booth after suitable conditioning.
  • wet separation systems are used.
  • wet separators known from the market water flows together with the exhaust air from the cabin to an air flow accelerating nozzle. In this nozzle there is a turbulence of the flowing cabin exhaust air with the water. During this process, the overspray particles largely pass into the water, so that the air leaves the wet scrubber substantially purified and the paint overspray particles are in the water. From this they can then be recovered or disposed of.
  • wet scrubbers is relatively much energy for circulation of the required quite large amount of water and to overcome the pressure difference between cabin, nozzle and disposal space needed.
  • the treatment of the rinse water is costly due to the high use of paint-binding and detackifying chemicals and the Lackschlammentsorgung. Furthermore, the air absorbs a lot of moisture due to the intensive contact with the rinse water, which in turn results in a high energy consumption for the air treatment in the recirculation mode or requires discarding of the exhaust air at high moisture or solvent content.
  • a plant of the type mentioned is from the US 5 264 014 A known.
  • There collecting electrodes of an electrostatic working separation device are not cleaned mechanically, but by means of water, which is passed from above over the collecting electrodes. If the overspray particles are not water soluble, however, the cleaning remains incomplete.
  • Object of the present invention is to provide a system for coating objects such that the operation of the electrostatic precipitator is more problem-free, in particular the overspray particles can be more easily removed from the separation surface.
  • the overspray particles are thus taken up at the separation surface by a separating liquid, with which they can be transported away.
  • the amounts of separation liquid required for this purpose are relatively small, so that the above-mentioned problems that occur in wet scrubbers, do not fall into the weight.
  • the Abscheideomekeit must be tailored to the overspray particles; it may also contain additives which facilitate the subsequent removal of the overspray particles from the deposition liquid.
  • the construction of the separator for the separating liquid is such that a feed chute is provided, which is formed in the lowermost region of two spring plates.
  • a feed chute is provided, which is formed in the lowermost region of two spring plates.
  • the two slide plates are provided which actively contribute, by their reciprocal movement, to discharging the separating liquid from the feed chute.
  • a Clogging of the gap between the Abscheideelektrode and the spring plates reliably prevented by possibly entrained paint particles.
  • the lower edges of the spring plates are crenellated or shaped like a coarse comb.
  • This type of construction also contributes to the fact that the separating liquid escapes from the feed chute to the separating plates to the correct extent and in the correct distribution.
  • the geometry of the "battlements" or the spaces between the comb teeth can be selected according to the respective needs.
  • a device is preferably provided, with which the lower edges of the spring plates are so far away from the system at the Abscheide inhabit the Abscheidideelektrode that the contents of the feed chute can leak. In this way, a cleaning of the feed chute from time to time is possible, which requires a complete emptying of the feed chute.
  • the system according to the invention is particularly suitable for painting objects.
  • the articles are preferably vehicle bodies.
  • FIG. 1 Reference is made, in which a painting plant for painting vehicle bodies is shown. Overall, it bears the reference numeral 1. In the upper half of a painting booth 2 is partially shown, which is configured in a known manner and therefore need not be explained in detail below.
  • the vehicle bodies to be painted are perpendicular to the plane of the FIG. 1 conveyed continuously or intermittently by means of a transport system, not shown, and thereby applied from application facilities, which are also not shown, with paint.
  • Conditioned air is introduced in uniform flow from this air plenum via a filter blanket in the interior of the spray booth 2. There, it flows downwards, takes on the non-adhering to the vehicle body paint overspray and leaves the Lackierkabine 2 by a large, covered by a walk-in grate 4 lower opening. 3
  • the entire paint booth 2 rests on a steel structure 5, as is known per se.
  • the plant area 6 comprises a separation chamber 9, which is closed on all sides by walls 8 except for the upper opening 3 and further openings for the passage of the air.
  • the separation chamber 9 are two baffles 10 and 11. Das in FIG. 1 Left baffle 11 has a larger, relatively little inclined from outside to inside portion 11a and a subsequent thereto more inclined portion 11b.
  • the section 10a can be pivoted from the working position shown by a solid line in a maintenance position shown in dashed lines.
  • the portion 10b can be pivoted from the vertical working position to a maintenance position.
  • From laterally mounted distribution channels 62 may have a Abscheidesammlungkeit on the baffles 10 and 11 in a more or less coherent layer on the upper surface flow down.
  • a baffle 65 which extends curved between the wall 8a and the bottom 8b of the transitional space 12, provides a streamlined transition of the air in the transitional space 12th
  • a receiving space 13 is provided for a total of the reference numeral 14 provided electrostatic separating device.
  • the receiving space 13 is connected via a lower opening 15 with the transition space 12 and via an upper opening 16 with the space below the portion 10 a of the baffle 10 and from there via a horizontally oriented air duct 17 with an air collecting channel 18 in connection.
  • the latter leads to an air conditioning device, not shown, with which the cleaned air is brought back to the correct temperature and humidity, so that it can be fed again to the air plenum above the spray booth 2.
  • the volume of recirculated air is selected as a function of non-removable substances.
  • FIGS. 2 to 6 Referenced As the perspective view of the separator 14 in FIG. 2 can be removed, this includes a housing 19, which is substantially down, front and top is open. Within the housing 19 is located next to each other a plurality of designed as inserts separation units 21 and 22, which have different widths.
  • Each separation unit 21 comprises a front end plate 23 and a rear end plate 24. Between the two end plates 23 and 24, centrally connected to these, extending a plate-shaped deposition electrode 25, which is vertically aligned in the operating state. On both sides of the deposition electrode 25, a counter-electrode device 26 is provided in each case. In FIG. 3 only one of these counter electrode means 26 is shown; the second, identically formed is disposed behind the deposition electrode 25 and in FIG. 3 obscured by this.
  • the counter-electrode device 26 has a lower corona region 26a, in which in the illustrated embodiment five corona wires 27 are provided, which are parallel to each other and at a distance from the deposition electrode 25 between a front end plate 23 adjacent holding rod (in FIG. 3 hidden) and a corresponding, the rear end plate 24 adjacent support rod 70 extend and are electrically connected to these support rods 70.
  • corona region 26a is a field region 26b of the counter-electrode device 26.
  • this field region 26b is realized by a grid-like field electrode 29, which is mounted parallel to the precipitation electrode 25 in a metallic frame 71 at a distance therefrom.
  • the field electrode 29 is electrically connected to the frame 71, which in turn is again electrically connected to the support rods 70, so that therefore the field electrode 29 and the corona wires 27 are substantially at the same potential.
  • Brackets 30 are used to attach the frame 71 and thus the entire counter electrode means 26 on the front end plate 23 and the rear end plate 24. All brackets 30 are formed as insulators; two brackets 30 on the front end plate 23 additionally contain high voltage connections.
  • the separation unit 21 is designed as a slot; This means that it can be pulled out of the housing 19 as a unit.
  • the deposition electrode 25 engages with its upper end portion of the gap 38 in the rail 36.
  • a plurality of pairs of rollers 39a, 39b stored in the FIGS. 4 to 6 are arranged perpendicular to the plane of the drawing at a distance from each other.
  • the deposition electrode 25 moves in the gap 38 accordingly until it finally comes off the rail 36.
  • the separation unit 21 thus removed can then be maintained if necessary.
  • the insertion the separation unit 21 takes place analogously in the reverse manner.
  • the narrower separation units 22 change, like the FIG. 2 can be seen, with the wider separation units 21 from, where marginal always the wider separation units 21 are provided in the housing 19.
  • the smaller width of the separation units 22 is explained by the fact that they do not have any counter-electrode means on either side of the deposition electrode.
  • each deposition electrode 25 is assigned a counter-electrode device 26.
  • all counterelectrode devices 26 cooperate with two deposition electrodes 25, one of which is associated with a wider separation unit 21 and the other with a narrower separation unit 22.
  • the said outermost counter-electrode devices 26 each additionally cooperate with the inner surface of the adjacent side wall of the housing 19, which also serves as Abscheide Chemistry and is connected in accordance with potential.
  • the upper side of the housing 19 of the separating device 14 is covered by an arrangement 44 of feed devices 80 with the aid of which the separating electrodes 25 of the separating units 21, 22 can be supplied from above with separating liquid.
  • the main component of the feed device 80 is a feed channel 81, which surrounds the guide rail 36 and the upper region of the deposition electrode 25 and, like these, extends from the front end plate 23 to the rear end plate 24.
  • the feed channel 81 comprises two angled symmetrical profiles 82, 83 whose upper, horizontally extending legs 82a, 83e abut each other in the normal state with their edges, as shown in FIGS FIGS. 4 and 5 is shown.
  • the lower legs 82a, 83b of the two profiles 82, 83 converge towards each other towards the bottom, but keep their spacing from each other.
  • the feed channel 81 delimited by the profiles 82, 83 and the spring plates 84, 85 is connected to a source of a separating liquid at a suitable location, which can not be seen in the drawing.
  • the two profiles are each held in their end plates 23, 24 adjacent end portions by means of two angles 86, 87, the upper, substantially horizontal legs 86a, 86b extending in the direction of the median plane of the feeder 80. Their tops are, as will be clear below, actuating surfaces.
  • the angle 86, 87 are about axes 88, 89th pivotable, which extend between the front end plate 23 and the rear end plate 24 and are fixed to these end plates 23, 24.
  • Another axis 90 which is also mounted in the two end plates 23, 24, is rotationally and eccentrically connected to a cam 91.
  • the cam 91 can by turning the axis 90 between an in FIG. 4 in which it has substantially upwards and has no contact with the angles 86, 87 and one in FIG. 6 shown position in which they the legs 86a, 86b of the angle 86, 87 down and the profiles 82, 83 apart, are rotated.
  • Actuating pins 94, 95 extend in the vertical direction through guide bores in these guide blocks 92, 93.
  • the actuating pins 94, 95 lying on opposite sides of the center plane of the feed device 80 are connected to one another in their upper end regions by an actuating plate 96.
  • the operating plate 96 can be pushed down by an actuating mechanism, with the actuating pins 94, 95 moved downwardly.
  • the lower ends of the actuating pins 94, 95 are each connected to the horizontal legs of angle sections 97, 98, whose vertical legs each carry a slide plate 99, 100.
  • the slide plates 99, 100 abut with their inwardly facing surfaces on opposite sides of the deposition electrode 25. Your bottom edge may coincide with the actuator plate 96 and the actuating pin 94, 95 between an upper position, the in FIG. 4 is shown, and a lower position in FIG. 5 shown, move.
  • the slide plates 99, 100 In the upper position of the FIG. 4 are the lower edges of the slide plates 99, 100 above the lower edges of the spring plates 84, 85, while in the lower position of the FIG. 5 the slide plates 99, 100, the spring plates 84, 85 slightly apart and their lower edges, the spring plates 84, 85 project beyond the bottom.
  • tension springs 101, 102 which seek to pull the entire assembly of actuator plate 96, actuating pin 94, 95, angles 97, 98 and slide plates 99, 100 upwards.
  • the separation device 14 was previously ready. made. This means, on the one hand, that the required high voltage is applied to the counterelectrode devices 26. On the other hand, the feed channels 81 of the various feed devices 80 have been filled with separating liquid so far that at least the space lying between the spring strips 84, 85 is filled on opposite sides of the slide plates 99, 100 or the separating electrode 25. Care is taken to ensure that this level of the separating liquid in the gutters 81 is permanently maintained.
  • a contiguous layer of the deposition liquid flows down and thus arrives at the opposite separation surfaces of the deposition electrodes 25.
  • the deposition liquid flows as a uniform layer further down on the deposition electrodes 25 and then drips from their lower edges into the sump 61 of the transitional space 12.
  • the separating liquid is withdrawn continuously or intermittently from the sump 61 and freed of the overspray particles by a suitable method, for example by filtration. It can then be returned to the paint shop 1 for reuse.
  • the separating liquid may be more or less viscous.
  • the slide plates 99, 100 are provided. These are at appropriate intervals by pressing the actuator plate 96 from the in FIG. 4 shown upper in the in figure 5 moved shown lower position. In each such stroke, a given quantum of the deposition liquid is actively forced outwardly onto the lower regions of the separation surfaces of the deposition electrode 25.
  • FIG. 2 An actuating mechanism with which this can be done is in FIG. 2 shown schematically and generally provided with the reference numeral 103. It comprises a arranged on the outside of the housing 19 geared motor 104, the two rods 105, 106 two shafts 107, 108 can rotate back and forth by a certain angle.
  • the shafts 107, 108 run parallel to each other in the upper region of the housing 19 perpendicular to the rails 36 and the feed chutes 81.
  • the shafts 107, 108 carry a rotationally locking for each separation unit 21, 22 an actuator 109, which in not further interest here with a way Actuating plate 96 of a feeder 80 cooperates.
  • the actuating device 103 it is possible with the actuating device 103 to move all slider plates 84, 85 back and forth in the separating device 14 between their two positions.
  • FIGS. 7 to 10 a second embodiment of a feed device is shown, with which the Abscheide perennial a Abscheideelektrode Abscheideomeeckkeit can be supplied.
  • the embodiment of the FIGS. 7 to 10 is structurally simpler than that of FIGS. 1 to 6 but does essentially the same thing.
  • Components of the second embodiment that correspond to those of the first are designated by the same reference numeral plus 100.
  • FIGS. 8 to 10 are essentially identically recognize the one rail forming hollow section 136 with the gap 138 in the bottom.
  • the upper portion of a Abscheideelektrode 125 extends through the gap 138 upwardly into the interior of the rail 136.
  • roller pairs 139a, 139b mounted on the Abscheideelektrode 125 and run on the two lower flanges of the rail 136 from.
  • the feeder 180 includes a feed chute 181 which is in some way connected to a source of a deposition liquid.
  • the feed chute 181 is in turn bounded by two profiled sheets 182, 183 and by two spring sheets 184, 185 secured to lower legs of the profiled sheets 182, 183.
  • the spring plates 184, 185 are not screwed in this case, but glued.
  • FIGS. 1 to 6 are the profile sheets 182, 183 immovable and are connected at both opposite ends in each case with an end wall of the corresponding separation unit.
  • the lower edges of the spring plates 184, 185 are in the normal state at the lateral Abscheide inhabit the Abscheideelektrode 125 at.
  • FIGS. 7 to 10 has two slide plates 199, 200 which abut on opposite sides of the Abscheideelektrode 125 slidably and can be moved between different positions, which in the FIGS. 8 to 10 are shown.
  • each angled spacer plate 210 and 211 is arranged, which has in its lower portion rectangular, downwardly projecting projections 210a and 211a, which are bent back into itself, so that in this case an edge region with a thickness that corresponds approximately to twice the sheet thickness.
  • the projections 210a, 211a may have different or even equal distances from each other.
  • In alignment with the distances between adjacent projections 210a, 211a are located in the slide plates 199, 200 as well as in the FIG. 7 also shown in the Abscheideelektröde 125 window 230, which allow leveling of the located on both sides of the Abscheideelektrode 125 Abscheideorganizkeit.
  • the slide plates 199, 200 are moved up and down by an actuator 203, which serves as a power source a hydraulic or pneumatic short-stroke double cylinder 215 has.
  • the short-stroke double cylinder 215 is composed of two Kurzhubzylindern 215a, 215b, which are arranged in opposite directions to each other and are secured together with their housings.
  • the piston rod 215ba of the lower Kurzhubzylinders 215b is attached to a part 216 which in turn is fixedly connected to the housing of the separator.
  • a vertically extending guide rail 217 on which a movable carriage 218 is guided.
  • the carriage 218 is connected via an angle plate 219 with the piston rod 215aa of the upper Kurzhubzylinders 215a motion fit.
  • FIG. 8 shows the "normal" work situation.
  • this lie the lower edges of the spring plates 184, 185 at the opposite lying Abscheide lake the Abscheideelektrode 125.
  • Abscheideengkeit Within the spring plates 184, 185 is Abscheideengkeit which, as in the first embodiment, is replenished as needed, in the feed chute 181 to maintain an approximately constant level.
  • the lower edges of the slide plates 199, 200 are located above the lower edges of the spring plates 184, 185 and the lower edge of the spacers 210, 211 is located in even greater height.
  • the slide plates 199, 200 are pushed downwards by corresponding actuation of the upper short-stroke cylinder 215a so that the lower edges slide below the lower edges of the spring plates 184, 185, like this in FIG. 9 is shown.
  • a certain amount of the separating liquid is actively brought down from the feed chute 181 to the opposite separation surfaces of the deposition electrode 125.
  • the lower edges of the spacer plates 210, 211 remain at a height such that they have no influence on the position and shape of the spring plates 184, 185.
  • Positions shown change the slide plates 199, 200 and - in the same cycle hereby - the spacer plates 210, 211 back and forth.
  • the deposition liquid contained in the feed chute 181 can easily drain through the spaces between the protrusions 210a, 211a.
  • FIG. 7 shown perspective of the feeder 180 is a distinctive feature recognizable, which also in the embodiment of FIGS. 1 to 6 could be realized:
  • the lower edge of the spring plates 184, 185 is namely there is not straight but crenellated.
  • the spring plates 184, 185 thus rest against the precipitation electrode 125 only with the lower edges of the crenellated, downwardly pointing projections.
  • This measure also serves to promote the flow of separating liquid out of the guide channel 181, in particular when the separating liquid is relatively viscous.

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  • Electrostatic Separation (AREA)
  • Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
  • Electrostatic Spraying Apparatus (AREA)
  • Coating Apparatus (AREA)

Description

Die Erfindung betrifft eine Anlage zum Beschichten von Gegenständen nach dem Oberbegriff des Patentanpruchs 1.The invention relates to a system for coating objects according to the preamble of patent claim 1.

Bei der manuellen oder automatischen Applikation von Lacken auf Gegenständen gelangt ein Teilstrom des Lackes, der im Allgemeinen sowohl Festkörper als auch Lösemittel und/oder Bindemittel enthält, nicht auf den Gegenstand. Dieser Teilstrom wird in der Fachwelt "Overspray" genannt. Der Overspray wird von dem Luftstrom in der Beschichtungskabine erfasst und einer Abscheidung zugeführt, so dass die Luft gegebenenfalls nach einer geeigneten Konditionierung wieder in die Beschichtungskabine zurückgeleitet werden kann.In the manual or automatic application of paints on objects, a partial flow of the paint, which generally contains both solid and solvent and / or binder does not reach the object. This partial flow is called "overspray" in the professional world. The overspray is detected by the air flow in the coating booth and fed to a separation, so that the air can optionally be returned to the coating booth after suitable conditioning.

Insbesondere bei Anlagen mit größerem Lackverbrauch, beispielsweise bei Anlagen zum Lackieren von Fahrzeugkarosserien, kommen bevorzugt Nassabscheidesysteme zum Einsatz. Bei vom Markt her bekannten Nassabscheidern fließt Wasser gemeinsam mit der von oben kommenden Kabinenabluft zu einer die Luftströmung beschleunigenden Düse. In dieser Düse findet eine Verwirbelung der durchströmenden Kabinenabluft mit dem Wasser statt. Bei diesem Vorgang treten die Overspray-Partikel weitgehend in das Wasser über, so dass die Luft den Nassabscheider im Wesentlichen gereinigt verlässt und sich die Lackoverspray-Partikel im Wasser befinden. Aus diesem können sie dann wiedergewonnen oder entsorgt werden. Bei bekannten Nassabscheidern wird verhältnismäßig viel Energie zur Umwälzung der erforderlichen recht großen Wassermenge und zur Überwindung der Druckdifferenz zwischen Kabine, Düse und Entsorgungsraum benötigt. Die Aufbereitung des Spülwassers ist durch den hohen Einsatz an lackbindenden und entklebenden Chemikalien und durch die Lackschlammentsorgung kostenintensiv. Weiterhin nimmt die Luft durch den intensiven Kontakt mit dem Spülwasser sehr viel Feuchtigkeit auf, was im Umluftbetrieb wiederum einen hohen Energieverbrauch für die Luftaufbereitung zur Folge hat bzw. bei hohem Feuchte- oder Lösungsmittelgehalt das Verwerfen der Abluft erfordert.Especially in systems with greater paint consumption, for example in systems for painting vehicle bodies, preferably wet separation systems are used. In the case of wet separators known from the market, water flows together with the exhaust air from the cabin to an air flow accelerating nozzle. In this nozzle there is a turbulence of the flowing cabin exhaust air with the water. During this process, the overspray particles largely pass into the water, so that the air leaves the wet scrubber substantially purified and the paint overspray particles are in the water. From this they can then be recovered or disposed of. In known wet scrubbers is relatively much energy for circulation of the required quite large amount of water and to overcome the pressure difference between cabin, nozzle and disposal space needed. The treatment of the rinse water is costly due to the high use of paint-binding and detackifying chemicals and the Lackschlammentsorgung. Furthermore, the air absorbs a lot of moisture due to the intensive contact with the rinse water, which in turn results in a high energy consumption for the air treatment in the recirculation mode or requires discarding of the exhaust air at high moisture or solvent content.

Bei vom Markt her bekannten Vorrichtungen wird demgegenüber auf trockenem Weg abgeschieden, indem von der vorbeiströmenden Kabinenluft mitgeführte Overspray-Partikel durch die Gegenelektrodeneinrichtung der elektrostatisch arbeitenden Abscheidevorrichtung ionisiert werden und aufgrund des zwischen der Abscheideelektrode und der Gegenelektrodeneinrichtung aufgebauten elektrischen Felds zur Abscheidefläche der Abscheideelektrode wandern, an welcher sie sich abscheiden.In the case of devices known from the market, by contrast, it is deposited on a dry route by ionizing overspray particles entrained by the passing cabin air through the counterelectrode device of the electrostatically operating separation device and moving to the separation surface of the deposition electrode due to the electric field established between the deposition electrode and the counterelectrode device which they separate.

Bei den bekannten Anlagen werden die an der Abscheidefläche haftenden Overspray-Partikel mechanisch von dieser abgestreift und abtransportiert.In the known systems, the adhering to the separation surface overspray particles are mechanically stripped and transported away from this.

Eine Anlage der eingangs genannten Art ist aus der US 5 264 014 A bekannt geworden. Dort werden Sammelelektroden einer elektrostatisch arbeitenden Abscheidevorrichtung nicht mechanisch, sondern mittels Wasser gereinigt, welches von oben über die Sammelelektroden geleitet wird. Falls die Overspray-Partikel nicht wasserlöslich sind, bleibt allerdings die Reinigung unvollständig.A plant of the type mentioned is from the US 5 264 014 A known. There collecting electrodes of an electrostatic working separation device are not cleaned mechanically, but by means of water, which is passed from above over the collecting electrodes. If the overspray particles are not water soluble, however, the cleaning remains incomplete.

Aufgabe der vorliegenden Erfindung ist es, eine Anlage zur Beschichtung von Gegenständen derart auszubilden, dass der Betrieb der elektrostatischen Abscheidevorrichtung problemfreier ist, insbesondere die Overspray-Partikel leichter von der Abscheidefläche entfernt werden können.Object of the present invention is to provide a system for coating objects such that the operation of the electrostatic precipitator is more problem-free, in particular the overspray particles can be more easily removed from the separation surface.

Diese Aufgabe wird erfindungsgemäß durch eine Anlage mit den im Patentanspruch 1 angegebenen Merkmalen gelöst.This object is achieved by a system with the features specified in claim 1.

Wie im Stand der Technik bekannt, werden also die Overspray-Partikel an der Abscheidefläche von einer Abscheideflüssigkeit aufgenommen, mit der sie abtransportiert werden können. Die Mengen der hierfür benötigten Abscheideflüssigkeit sind verhältnismäßig gering, so dass die oben geschilderten Probleme, die bei Nassabscheidern auftreten, nicht ins Gewicht fallen. Selbstverständlich muss die Abscheideflüssigkeit auf die Overspray-Partikel abgestimmt sein; sie kann auch Zusätze enthalten, welche die nachträgliche Entfernung der Overspray-Partikel aus der Abscheideflüssigkeit erleichtern.As is known in the prior art, the overspray particles are thus taken up at the separation surface by a separating liquid, with which they can be transported away. The amounts of separation liquid required for this purpose are relatively small, so that the above-mentioned problems that occur in wet scrubbers, do not fall into the weight. Of course, the Abscheideflüssigkeit must be tailored to the overspray particles; it may also contain additives which facilitate the subsequent removal of the overspray particles from the deposition liquid.

Erfindungsgemäß ist die Bauweise der Zuführeinrichtung für die Abscheideflüssigkeit derart, dass eine Zuführrinne vorgesehen ist, die im untersten Bereich von zwei Federblechen gebildet ist. Dies stellt eine besonders einfache Art dar, die Abscheideflächen der Abscheideelektrode mit Abscheideflüssigkeit zu versorgen. Letztere "leckt" einfach durch den nicht ganz dichten Spalt zwischen den unteren Rändern der Federbleche und den Abscheideflächen der Abscheideelektrode hindurch.According to the invention, the construction of the separator for the separating liquid is such that a feed chute is provided, which is formed in the lowermost region of two spring plates. This is a particularly simple way to provide the Abscheideflächen the Abscheideelektrode with Abscheideflüssigkeit. The latter simply "leaks" through the not quite tight gap between the lower edges of the spring plates and the separation surfaces of the deposition electrode.

Um sicherzustellen, dass auch bei höherviskosen Abscheideflüssigkeiten ein ausreichendes, kontinuierliches und flächiges Abströmen aus der Zuführrinne erfolgt, sind die beiden Schieberbleche vorgesehen, die durch ihre reziprozierende Bewegung aktiv zum Austragen der Abscheideflüssigkeit aus der Zuführrinne beitragen. Außerdem wird ein Verstopfen des Spaltes zwischen der Abscheideelektrode und den Federblechen durch ggfs. mitgeführte Lackpartikel zuverlässig verhindert.In order to ensure that sufficient, continuous and flat outflow from the feed chute takes place, even in the case of relatively high-viscosity separation liquids, the two slide plates are provided which actively contribute, by their reciprocal movement, to discharging the separating liquid from the feed chute. In addition, a Clogging of the gap between the Abscheideelektrode and the spring plates reliably prevented by possibly entrained paint particles.

Bei einer bevorzugten Ausführungsform der erfindungsgemäßen Anlage sind die unteren Ränder der Federbleche zinnenartig bzw. nach Art eines groben Kammes geformt. Auch diese Bauweise trägt dazu bei, dass die Abscheideflüssigkeit im richtigen Maße und in der richtigen Verteilung aus der Zuführrinne auf die Abscheidebleche austritt. Die Geometrie der "Zinnen" bzw. der Zwischenräume zwischen den Kammzinken kann entsprechend den jeweiligen Bedürfnissen gewählt werden.In a preferred embodiment of the system according to the invention, the lower edges of the spring plates are crenellated or shaped like a coarse comb. This type of construction also contributes to the fact that the separating liquid escapes from the feed chute to the separating plates to the correct extent and in the correct distribution. The geometry of the "battlements" or the spaces between the comb teeth can be selected according to the respective needs.

Zusätzlich ist vorzugsweise eine Einrichtung vorgesehen, mit welcher die unteren Ränder der Federbleche von der Anlage an den Abscheideflächen der Abscheideelektrode so weit weg bewegbar sind, dass der Inhalt der Zuführrinne auslaufen kann. Auf diese Weise ist eine Reinigung der Zuführrinne von Zeit zu Zeit möglich, die eine vollständige Entleerung der Zuführrinne voraussetzt.In addition, a device is preferably provided, with which the lower edges of the spring plates are so far away from the system at the Abscheideflächen the Abscheidideelektrode that the contents of the feed chute can leak. In this way, a cleaning of the feed chute from time to time is possible, which requires a complete emptying of the feed chute.

Die erfindungsgemäße Anlage eignet sich besonders zum Lackieren von Gegenständen.The system according to the invention is particularly suitable for painting objects.

Bei den Gegenständen handelt es sich vorzugsweise um Fahrzeugkarosserien.The articles are preferably vehicle bodies.

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnung näher erläutert. Es zeigen;

Figur 1
einen vertikalen Teilschnitt durch eine Lackieranlage zum Lackieren von Fahrzeugkarosserien;
Figur 2
perspektivisch eine elektrostatische Abscheidevorrichtung für Lack-Overspray, die in der Lackieranlage von Figur 1 verwendet wird;
Figur 3
perspektivisch eine erste Art einer Abscheideeinheit aus der Abscheidevorrichtung der Figur 2;
Figuren 4 bis 6
die Stirnansicht einer Zuführeinrichtung für eine Abscheideflüssigkeit und einer zugeordneten Abscheideelektrode in unterschiedlichen Betriebspositionen;
Figur 7
perspektivisch ein alternatives Ausführungsbeispiel einer Zuführeinrichtung für eine Abscheideflüssigkeit;
Figuren 8 bis 10
in der Stirnansicht die Zuführeinrichtung der Figur 7, erneut in unterschiedlichen Betriebspositionen zusammen mit einer Betätigungseinrichtung.
Embodiments of the invention are explained below with reference to the drawing. Show it;
FIG. 1
a vertical section through a paint shop for painting vehicle bodies;
FIG. 2
in perspective, an electrostatic precipitator for paint overspray in the paint shop of FIG. 1 is used;
FIG. 3
perspective view of a first type of separation unit from the deposition of the FIG. 2 ;
FIGS. 4 to 6
the front view of a supply of a separating liquid and an associated Abscheidelektrode in different operating positions;
FIG. 7
in perspective, an alternative embodiment of a delivery device for a Abscheideflüssigkeit;
FIGS. 8 to 10
in the front view, the feeder of FIG. 7 , again in different operating positions together with an actuator.

Zunächst wird auf Figur 1 Bezug genommen, in welcher eine Lackieranlage zum Lackieren von Fahrzeugkarosserien dargestellt ist. Sie trägt insgesamt das Bezugszeichen 1. In der oberen Hälfte ist teilweise eine Lackierkabine 2 gezeigt, die in bekannter Weise ausgestaltet ist und daher nachfolgend nicht näher erläutert zu werden braucht. Die zu lackierenden Fahrzeugkarosserien werden senkrecht zur Zeichenebene der Figur 1 mit Hilfe eines nicht dargestellten Transportsystems kontinuierlich oder intermittierend gefördert und dabei aus Applikationseinrichtungen, die ebenfalls nicht gezeigt sind, mit Lack beaufschlagt.First, it will open FIG. 1 Reference is made, in which a painting plant for painting vehicle bodies is shown. Overall, it bears the reference numeral 1. In the upper half of a painting booth 2 is partially shown, which is configured in a known manner and therefore need not be explained in detail below. The vehicle bodies to be painted are perpendicular to the plane of the FIG. 1 conveyed continuously or intermittently by means of a transport system, not shown, and thereby applied from application facilities, which are also not shown, with paint.

Nicht eigens dargestellt ist außerdem ein Luftplenum, welches sich oberhalb der Lackierkabine 2 befindet.Not specifically shown is also a Luftplenum, which is located above the spray booth 2.

Konditionierte Luft wird in gleichmäßigem Strom aus diesem Luftplenum über eine Filterdecke in den Inneraum der Lackierkabine 2 eingebracht. Dort fließt sie nach unten, nimmt den nicht an den Fahrzeugkarosserien haftenden Lack-Overspray auf und verlässt die Lackierkabine 2 durch eine großflächige, durch einen begehbaren Gitterrost 4 abgedeckte untere Öffnung 3.Conditioned air is introduced in uniform flow from this air plenum via a filter blanket in the interior of the spray booth 2. There, it flows downwards, takes on the non-adhering to the vehicle body paint overspray and leaves the Lackierkabine 2 by a large, covered by a walk-in grate 4 lower opening. 3

Die gesamte Lackierkabine 2 ruht auf einem Stahlbau 5, wie dies an und für sich bekannt ist.The entire paint booth 2 rests on a steel structure 5, as is known per se.

Unterhalb der Lackierkabine 2 befindet sich ein Anlagenbereich 6, in welchem die die Lackierkabine 2 über die Öffnung 3 verlassende Overspray-Partikel-beladene Luft wieder gereinigt wird. Der Anlagenbereich 6 umfasst einen Abscheideraum 9, der bis auf die obere Öffnung 3 und weitere der Durchführung der Luft dienende Öffnungen allseits durch Wände 8 abgeschlossen ist. Innerhalb des Abscheideraumes 9 befinden sich zwei Leitbleche 10 und 11. Das in Figur 1 linke Leitblech 11 besitzt einen größeren, verhältnismäßig wenig von außen nach innen geneigten Abschnitt 11a und einen sich an diesen anschließenden stärker geneigten Abschnitt 11b. In ähnlicher Weise besitzt das Leitblech 10, welches in Figur 1 rechts gezeigt ist, einen äußeren, verhältnismäßig wenig von außen nach innen geneigten Abschnitt 10a sowie einen sich an diesen anschließenden, im dargestellten Ausführungsbeispiel senkrecht nach unten führenden Abschnitt 10b. Der Abschnitt 10a lässt sich aus der durchgezogen dargestellten Arbeitsposition in eine gestrichelt dargestellte Wartungsposition verschwenken. In ähnlicher Weise lässt sich der Abschnitt 10b aus der vertikalen Arbeitsposition in eine Wartungsposition verschwenken.Below the painting booth 2 there is a plant area 6, in which the overspray particle-laden air leaving the paint booth 2 via the opening 3 is cleaned again. The plant area 6 comprises a separation chamber 9, which is closed on all sides by walls 8 except for the upper opening 3 and further openings for the passage of the air. Within the separation chamber 9 are two baffles 10 and 11. Das in FIG. 1 Left baffle 11 has a larger, relatively little inclined from outside to inside portion 11a and a subsequent thereto more inclined portion 11b. Similarly, the baffle 10, which in FIG. 1 is shown on the right, an outer, relatively little inclined from outside to inside portion 10a and a subsequent thereto, in the illustrated embodiment, vertically downwardly leading portion 10b. The section 10a can be pivoted from the working position shown by a solid line in a maintenance position shown in dashed lines. Similarly, the portion 10b can be pivoted from the vertical working position to a maintenance position.

Aus seitlich angebrachten Verteilerrinnen 62 kann eine Abscheideflüssigkeit auf die Leitbleche 10 und 11 in einer mehr oder weniger zusammenhängenden Schicht an deren oberer Fläche nach unten fließen.From laterally mounted distribution channels 62 may have a Abscheideflüssigkeit on the baffles 10 and 11 in a more or less coherent layer on the upper surface flow down.

Unterhalb des von den beiden Leitblechen 10 und 11 auf gegenüberliegenden Seiten begrenzten Raumes befindet sich ein Übergangsraum 12. Ein Leitblech 65, welches sich gekrümmt zwischen der Wand 8a und dem Boden 8b des Übergangsraumes 12 erstreckt, sorgt für einen strömungsgünstigen Übergang der Luft in den Übergangsraum 12.Below the bounded by the two baffles 10 and 11 on opposite sides of the space is a transitional space 12. A baffle 65, which extends curved between the wall 8a and the bottom 8b of the transitional space 12, provides a streamlined transition of the air in the transitional space 12th

Oberhalb des in Figur 1 rechten Bereichs des Übergangsraumes 12, rechts von dem vertikal verlaufenden Abschnitt 10b des Leitblechs 10, ist ein Aufnahmeraum 13 für eine insgesamt mit dem Bezugszeichen 14 versehene elektrostatisch arbeitende Abscheidevorrichtung vorgesehen. Der Aufnahmeraum 13 steht über eine untere Öffnung 15 mit dem Übergangsraum 12 und über eine obere Öffnung 16 mit dem Raum unterhalb des Abschnitts 10a des Leitbleches 10 und von dort über einen horizontal ausgerichteten Luftkanal 17 mit einem Luft-Sammelkanal 18 in Verbindung. Letzterer führt zu einer nicht dargestellten Luft-Konditioniereinrichtung, mit welcher die gereinigte Luft wieder auf die richtige Temperatur und Luftfeuchtigkeit gebracht wird, so dass sie erneut dem Luftplenum oberhalb der Lackierkabine 2 zugeleitet werden kann. In bekannter Weise wird das Volumen der rezirkulierten Luft in Abhängigkeit von nicht entfernbaren Substanzen gewählt.Above the in FIG. 1 Right portion of the transitional space 12, to the right of the vertically extending portion 10 b of the baffle 10, a receiving space 13 is provided for a total of the reference numeral 14 provided electrostatic separating device. The receiving space 13 is connected via a lower opening 15 with the transition space 12 and via an upper opening 16 with the space below the portion 10 a of the baffle 10 and from there via a horizontally oriented air duct 17 with an air collecting channel 18 in connection. The latter leads to an air conditioning device, not shown, with which the cleaned air is brought back to the correct temperature and humidity, so that it can be fed again to the air plenum above the spray booth 2. In a known manner, the volume of recirculated air is selected as a function of non-removable substances.

Zur Beschreibung der Abscheidevorrichtung 14 wird nunmehr auf die Figuren 2 bis 6 Bezug genommen. Wie der perspektivischen Ansicht der Abscheidevorrichtung 14 in Figur 2 entnommen werden kann, umfasst dieses ein Gehäuse 19, welches im Wesentlichen nach unten, vorne und oben offen ist. Innerhalb des Gehäuses 19 befindet sich nebeneinander eine Vielzahl von als Einschüben gestalteten Abscheideeinheiten 21 bzw. 22, die unterschiedlich breit sind.For the description of the separation device 14 is now on the FIGS. 2 to 6 Referenced. As the perspective view of the separator 14 in FIG. 2 can be removed, this includes a housing 19, which is substantially down, front and top is open. Within the housing 19 is located next to each other a plurality of designed as inserts separation units 21 and 22, which have different widths.

Der grundsätzliche Aufbau der breiteren Abscheideeinheiten 21 ist der Figur 3 zu entnehmen. Jede Abscheideeinheit 21 umfasst eine vordere Stirnplatte 23 und eine hintere Stirnplatte 24. Zwischen den beiden Stirnplatten 23 und 24, mittig mit diesen verbunden, erstreckt sich eine plattenförmige Abscheideelektrode 25, die im Betriebszustand vertikal ausgerichtet ist. Beidseits der,Abscheideelektrode 25 ist jeweils eine Gegenelektrodeneinrichtung 26 vorgesehen. In Figur 3 ist nur eine dieser Gegenelektrodeneinrichtungen 26 dargestellt; die zweite, identisch ausgebildete ist hinter der Abscheideelektrode 25 angeordnet und in Figur 3 von dieser verdeckt.The basic structure of the broader separation units 21 is the FIG. 3 refer to. Each separation unit 21 comprises a front end plate 23 and a rear end plate 24. Between the two end plates 23 and 24, centrally connected to these, extending a plate-shaped deposition electrode 25, which is vertically aligned in the operating state. On both sides of the deposition electrode 25, a counter-electrode device 26 is provided in each case. In FIG. 3 only one of these counter electrode means 26 is shown; the second, identically formed is disposed behind the deposition electrode 25 and in FIG. 3 obscured by this.

Die Gegenelektrodeneinrichtung 26 weist einen unteren Koronabereich 26a auf, in dem im dargestellten Ausführungsbeispiel fünf Koronadrähte 27 vorgesehen sind, die parallel zueinander und in Abstand zu der Abscheideelektrode 25 zwischen einer der vorderen Stirnplatte 23 benachbarten Haltestange (in Figur 3 verdeckt) und einer entsprechenden, der hinteren Stirnplatte 24 benachbarte Haltestange 70 verlaufen und mit diesen Haltestangen 70 elektrisch verbunden sind.The counter-electrode device 26 has a lower corona region 26a, in which in the illustrated embodiment five corona wires 27 are provided, which are parallel to each other and at a distance from the deposition electrode 25 between a front end plate 23 adjacent holding rod (in FIG. 3 hidden) and a corresponding, the rear end plate 24 adjacent support rod 70 extend and are electrically connected to these support rods 70.

Oberhalb des Koronabereiches 26a befindet sich ein Feldbereich 26b der Gegenelektrodeneinrichtung 26. Körperlich ist dieser Feldbereich 26b durch eine gitterartige Feldelektrode 29 verwirklicht, die parallel zur Abscheideelektrode 25, in Abstand zu dieser, in einem metallischen Rahmen 71 montiert ist. Die Feldelektrode 29 ist mit dem Rahmen 71 elektrisch verbunden, der seinerseits wieder mit den Haltestangen 70 elektrisch verbunden ist, so dass also die Feldelektrode 29 und die Koronadrähte 27 im Wesentlichen auf demselben Potential liegen.Above the corona region 26a is a field region 26b of the counter-electrode device 26. Physically, this field region 26b is realized by a grid-like field electrode 29, which is mounted parallel to the precipitation electrode 25 in a metallic frame 71 at a distance therefrom. The field electrode 29 is electrically connected to the frame 71, which in turn is again electrically connected to the support rods 70, so that therefore the field electrode 29 and the corona wires 27 are substantially at the same potential.

Halterungen 30 dienen der Befestigung des Rahmens 71 und damit der gesamten Gegenelektrodeneinrichtung 26 an der vorderen Stirnplatte 23 und der hinteren Stirnplatte 24. Alle Halterungen 30 sind als Isolatoren ausgebildet; zwei Halterungen 30 an der vorderen Stirnplatte 23 enthalten zusätzlich Hochspannungsanschlüsse.Brackets 30 are used to attach the frame 71 and thus the entire counter electrode means 26 on the front end plate 23 and the rear end plate 24. All brackets 30 are formed as insulators; two brackets 30 on the front end plate 23 additionally contain high voltage connections.

Wie bereits oben erwähnt, ist die Abscheideeinheit 21 als Einschub ausgebildet; dies heißt, dass sie als Einheit aus dem Gehäuse 19 herausgezogen werden kann.As already mentioned above, the separation unit 21 is designed as a slot; This means that it can be pulled out of the housing 19 as a unit.

Gehalten wird jede Abscheideeinheit 21 innerhalb des Gehäuses von einem eine Schiene bildenden Hohlprofil 36, in dessen Unterseite ein durchgehender Spalt 38 gebildet ist. Dies ist insbesondere den Figuren 4 bis 6 zu entnehmen.Held each separation unit 21 within the housing of a rail forming a hollow profile 36, in the underside of a continuous gap 38 is formed. This is especially the FIGS. 4 to 6 refer to.

Die Abscheideelektrode 25 durchgreift mit ihrem oberen Endbereich den Spalt 38 in der Schiene 36. An dem nach oben über den Spalt 38 überstehenden Bereich der Abscheideelektrode 25 ist eine Vielzahl von Rollenpaaren 39a, 39b gelagert, die in den Figuren 4 bis 6 senkrecht zur Zeichenebene in Abstand zueinander angeordnet sind. Ersichtlich ist es bei dieser Konstruktion möglich, die Abscheideeinheit 21 aus dem Gehäuse 19 herauszuziehen, wobei die Rollen 39a, 39b in der Schiene 36 auf den beidseits des Spaltes 38 liegenden unteren Flanschen ablaufen. Die Abscheideelektrode 25 bewegt sich in dem Spalt 38 entsprechend, bis sie schließlich von der Schiene 36 freikommt. Die so herausgenommene Abscheideeinheit 21 kann dann bei Bedarf gewartet werden. Das Einschieben der Abscheideeinheit 21 erfolgt sinngemäß in umgekehrter Weise.The deposition electrode 25 engages with its upper end portion of the gap 38 in the rail 36. At the above the gap 38 projecting portion of the deposition electrode 25 is a plurality of pairs of rollers 39a, 39b stored in the FIGS. 4 to 6 are arranged perpendicular to the plane of the drawing at a distance from each other. As can be seen, it is possible in this construction to pull the separating unit 21 out of the housing 19, wherein the rollers 39a, 39b in the rail 36 run on the lower flanges lying on both sides of the gap 38. The deposition electrode 25 moves in the gap 38 accordingly until it finally comes off the rail 36. The separation unit 21 thus removed can then be maintained if necessary. The insertion the separation unit 21 takes place analogously in the reverse manner.

Die schmäleren Abscheideeinheiten 22 wechseln, wie der Figur 2 zu entnehmen ist, mit den breiteren Abscheideeinheiten 21 ab, wobei randständig stets die breiteren Abscheideeinheiten 21 in dem Gehäuse 19 vorgesehen sind. Die geringere Breite der Abscheideeinheiten 22 erklärt sich daraus, dass diese beidseits der Abscheideelektrode keine Gegenelektrodeneinrichtung aufweisen.The narrower separation units 22 change, like the FIG. 2 can be seen, with the wider separation units 21 from, where marginal always the wider separation units 21 are provided in the housing 19. The smaller width of the separation units 22 is explained by the fact that they do not have any counter-electrode means on either side of the deposition electrode.

Aufgrund der alternierenden Anordnung und der beiden Arten von Abscheideeinheiten 21, 22 innerhalb der Abscheidevorrichtung 14 ist gewährleistet, dass jeweils beiden Abscheideflächen jeder Abscheideelektrode 25 eine Gegenelektrodeneinrichtung 26 zugeordnet ist. Mit Ausnahme der äußersten Gegenelektrodeneinrichtungen 26 an den randständigen breiten Abscheideeinheiten 21 arbeiten auf diese Weise alle Gegenelektrodeneinrichtungen 26 mit zwei Abscheideelektroden 25 zusammen, wovon eine einer breiteren Abscheideeinheit 21 und die andere einer schmäleren Abscheideeinheit 22 zugeordnet ist. Die genannten äußersten Gegenelektrodeneinrichtungen 26 arbeiten jeweils zusätzlich mit der Innenfläche der benachbarten Seitenwand des Gehäuses 19 zusammen, die ebenfalls als Abscheidefläche dient und potentialmäßig entsprechend geschaltet ist.Due to the alternating arrangement and the two types of separation units 21, 22 within the separation device 14, it is ensured that in each case two deposition surfaces of each deposition electrode 25 is assigned a counter-electrode device 26. In this way, with the exception of the outermost counterelectrode devices 26 on the peripheral wide separation units 21, all counterelectrode devices 26 cooperate with two deposition electrodes 25, one of which is associated with a wider separation unit 21 and the other with a narrower separation unit 22. The said outermost counter-electrode devices 26 each additionally cooperate with the inner surface of the adjacent side wall of the housing 19, which also serves as Abscheidefläche and is connected in accordance with potential.

Die Oberseite des Gehäuses 19 der Abscheidevorrichtung 14 wird von einer Anordnung 44 aus Zuführeinrichtungen 80 abgedeckt mit deren Hilfe den Abscheideelektroden 25 der Abscheideeinheiten 21, 22 von oben her Abscheideflüssigkeit zugeführt werden kann.The upper side of the housing 19 of the separating device 14 is covered by an arrangement 44 of feed devices 80 with the aid of which the separating electrodes 25 of the separating units 21, 22 can be supplied from above with separating liquid.

Zur näheren Beschreibung einer dieser Zuführungen 80 wird nunmehr erneut auf die Figuren 4 bis 6 Bezug genommen.For a more detailed description of one of these feeders 80 is now again to the FIGS. 4 to 6 Referenced.

Hauptbestandteil der Zuführeinrichtung 80 ist eine Zuführrinne 81, welche die Führungsschiene 36 und den oberen Bereich der Abscheideelektrode 25 umgibt und sich ebenso wie diese von der vorderen Stirnplatte 23 bis zur hinteren Stirnplatte 24 erstreckt. Die Zuführrinne 81 umfasst zwei gewinkelte symmetrische Profile 82, 83 deren obere, waagerecht verlaufende Schenkel 82a, 83e im Normalzustand mit ihren Rändern aneinanderstoßen, wie dies in den Figuren 4 und 5 gezeigt ist. Die unteren Schenkel 82a, 83b der beiden Profile 82, 83 konvergieren nach unten aufeinander zu, halten aber mit ihren Rändern voneinander Abstand. An diesen unteren Schenkeln 82b, 83b sind zwei Federbleche 84, 85 angeschraubt, die mit ihren unteren Rändern während des Normalbetriebes an gegenüberliegenden Seiten der Abscheideelektrode 25 federnd anliegen. Dies ist die in Figur 4 dargestellte Situation, in der jedoch aus Darstellungsgründen zwischen den unteren Rändern der Federbleche 84, 85 und den benachbarten Flächen der Abscheideelektrode 25 ein kleiner Abstand gezeigt ist.The main component of the feed device 80 is a feed channel 81, which surrounds the guide rail 36 and the upper region of the deposition electrode 25 and, like these, extends from the front end plate 23 to the rear end plate 24. The feed channel 81 comprises two angled symmetrical profiles 82, 83 whose upper, horizontally extending legs 82a, 83e abut each other in the normal state with their edges, as shown in FIGS FIGS. 4 and 5 is shown. The lower legs 82a, 83b of the two profiles 82, 83 converge towards each other towards the bottom, but keep their spacing from each other. At these lower legs 82b, 83b, two spring plates 84, 85 are screwed, which bear resiliently with their lower edges during normal operation on opposite sides of the deposition electrode 25. This is the in FIG. 4 illustrated situation in which, however, for purposes of illustration between the lower edges of the spring plates 84, 85 and the adjacent surfaces of the deposition electrode 25, a small distance is shown.

Die von den Profilen 82, 83 und den Federblechen 84, 85 begrenzte Zuführrinne 81 ist an einer geeigneten Stelle, die in der Zeichnung nicht erkennbar ist, mit einer Quelle einer Abscheideflüssigkeit verbunden.The feed channel 81 delimited by the profiles 82, 83 and the spring plates 84, 85 is connected to a source of a separating liquid at a suitable location, which can not be seen in the drawing.

Die beiden Profile sind jeweils in ihren den Stirnplatten 23, 24 benachbarten Endbereichen mit Hilfe zweier Winkel 86, 87 gehalten, deren obere, im Wesentlichen horizontale Schenkel 86a, 86b sich in Richtung auf die Mittelebene der Zuführeinrichtung 80 erstrecken. Ihre Oberseiten stellen, wie weiter unten noch deutlich wird, Betätigungsflächen dar. Die Winkel 86, 87 sind um Achsen 88, 89 verschwenkbar, die sich zwischen der vorderen Stirnplatte 23 und der hinteren Stirnplatte 24 erstrecken und an diesen Stirnplatten 23, 24 befestigt sind.The two profiles are each held in their end plates 23, 24 adjacent end portions by means of two angles 86, 87, the upper, substantially horizontal legs 86a, 86b extending in the direction of the median plane of the feeder 80. Their tops are, as will be clear below, actuating surfaces. The angle 86, 87 are about axes 88, 89th pivotable, which extend between the front end plate 23 and the rear end plate 24 and are fixed to these end plates 23, 24.

Eine weitere Achse 90, die ebenfalls in den beiden Stirnplatten 23, 24 gelagert ist, ist drehschlüssig und exzentrisch mit einer Kurvenscheibe 91 verbunden. Die Kurvenscheibe 91 kann durch Verdrehen der Achse 90 zwischen einer in Figur 4 dargestellten Position, in welcher sie im Wesentlichen nach oben weist und keinen Kontakt mit den Winkeln 86, 87 aufweist und einer in Figur 6 dargestellten Position, in welcher sie die Schenkel 86a, 86b der Winkel 86, 87 nach unten und die Profile 82, 83 auseinanderdrückt, verdreht werden. Der Sinn dieser Bauweise wird weiter unten deutlich werden.Another axis 90, which is also mounted in the two end plates 23, 24, is rotationally and eccentrically connected to a cam 91. The cam 91 can by turning the axis 90 between an in FIG. 4 in which it has substantially upwards and has no contact with the angles 86, 87 and one in FIG. 6 shown position in which they the legs 86a, 86b of the angle 86, 87 down and the profiles 82, 83 apart, are rotated. The meaning of this construction will be clear below.

Auf den Außenseiten der beiden vertikalen Schenkel der Schiene 36 sind zwei Führungsblöcke 92, 93 befestigt. Durch Führungsbohrungen in diesen Führungsblöcken 92, 93 verlaufen in vertikaler Richtung Betätigungsbolzen 94, 95. Die jeweils auf gegenüberliegenden Seiten der Mittelebene der Zuführeinrichtung 80 liegenden Betätigungsbolzen 94, 95 sind in ihren oberen Endbereichen durch eine Betätigungsplatte 96 miteinander verbunden. Die Betätigungsplatte 96 kann durch einen Betätigungsmechanismus nach unten gedrückt werden, wobei die Betätigungsbolzen 94, 95 nach unten bewegt werden.On the outer sides of the two vertical legs of the rail 36, two guide blocks 92, 93 are attached. Actuating pins 94, 95 extend in the vertical direction through guide bores in these guide blocks 92, 93. The actuating pins 94, 95 lying on opposite sides of the center plane of the feed device 80 are connected to one another in their upper end regions by an actuating plate 96. The operating plate 96 can be pushed down by an actuating mechanism, with the actuating pins 94, 95 moved downwardly.

Die unteren Enden der Betätigungsbolzen 94, 95 sind jeweils mit den horizontalen Schenkeln von Winkelprofilen 97, 98 verbunden, deren vertikale Schenkel jeweils ein Schieberblech 99, 100 tragen. Die Schieberbleche 99, 100 liegen mit ihren nach innen weisenden Flächen an gegenüberliegenden Seiten der Abscheideelektrode 25 an. Ihr unterer Rand kann sich gemeinsam mit der Betätigungsplatte 96 und den Betätigungsbolzen 94, 95 zwischen einer oberen Position, die in Figur 4 dargestellt ist, und eine unteren Position, die in Figur 5 gezeigt ist, bewegen. In der oberen Position der Figur 4 liegen die unteren Ränder der Schieberbleche 99, 100 oberhalb der unteren Ränder der Federbleche 84, 85, während in der unteren Position der Figur 5 die Schieberbleche 99, 100 die Federbleche 84, 85 etwas auseinanderbiegen und ihre unteren Ränder die Federbleche 84, 85 nach unten überragen.The lower ends of the actuating pins 94, 95 are each connected to the horizontal legs of angle sections 97, 98, whose vertical legs each carry a slide plate 99, 100. The slide plates 99, 100 abut with their inwardly facing surfaces on opposite sides of the deposition electrode 25. Your bottom edge may coincide with the actuator plate 96 and the actuating pin 94, 95 between an upper position, the in FIG. 4 is shown, and a lower position in FIG. 5 shown, move. In the upper position of the FIG. 4 are the lower edges of the slide plates 99, 100 above the lower edges of the spring plates 84, 85, while in the lower position of the FIG. 5 the slide plates 99, 100, the spring plates 84, 85 slightly apart and their lower edges, the spring plates 84, 85 project beyond the bottom.

Zwischen den Führungsblöcken 92, 93 und den horizontalen Schenkeln der Winkelprofile 97, 98 wirken jeweils Zugfedern 101, 102, welche die gesamte Anordnung aus Betätigungsplatte 96, Betätigungsbolzen 94, 95, Winkeln 97, 98 und Schieberblechen 99, 100 nach oben zu ziehen suchen.Between the guide blocks 92, 93 and the horizontal legs of the angle sections 97, 98 act respectively tension springs 101, 102, which seek to pull the entire assembly of actuator plate 96, actuating pin 94, 95, angles 97, 98 and slide plates 99, 100 upwards.

Die oben beschriebene Lackieranlage 1 und insbesondere der deren Luftreinigung dienende Anlagenbereich 6 arbeiten wie folgt:

  • Der beim Lackieren der Fahrzeugkarosserie in der Lackierkabine 2 entstehende Overspray wird von dem Luftstrom, der die Lackierkabine 2 von oben nach unten durchströmt, aufgenommen und mitgeführt. Der Luftstrom durchtritt den Rost 4 und gelangt auf diese Weise in den Abscheideraum 9. Er trifft dort auf die Leitbleche 10, 11 bzw. auf die über diese gleichmäßig abströmende Abscheideflüssigkeit. Bereits an dieser Stelle wird von der Abscheideflüssigkeit ein großer Teil der Overspray-Partikel aufgenommen. Die Abscheideflüssigkeit strömt entlang der Leitbleche 11, 10 nach unten und sammelt sich in einem Sumpf 61 im unteren Bereich des Übergangsraumes 12.
The paint shop 1 described above and in particular the plant area 6 serving for the purpose of air cleaning operate as follows:
  • The resulting overspray when painting the vehicle body in the spray booth 2 is received and carried by the air flow, which flows through the spray booth 2 from top to bottom. The air stream passes through the grate 4 and in this way enters the separation chamber 9. It meets the guide plates 10, 11 or the separating liquid flowing off uniformly there. Already at this point a large part of the overspray particles is taken up by the separating liquid. The separating liquid flows down along the guide plates 11, 10 and collects in a sump 61 in the lower region of the transitional space 12.

Auch die Luft, die nach wie vor mit Overspray-Partikeln beladen ist, wird trichterartig in den Übergangsraum 12 geführt, dort zunächst um 90° umgeleitet und sodann aus dem Übergangsraum 12 durch eine erneute 90°-Umlenkung von unten her in die untere Einlassöffnung 15 des Gehäuses 19 der Abscheidevorrichtung 14 eingeführt. Der Abscheideraum 9 und der Übergangsraum 12 bilden so einen Luftweg zwischen der Auslassöffnung 3 der Lackierkabine 2 und der Einlassöffnung 15 der Abscheidevorrichtung 14.Even the air, which still contains overspray particles is loaded, is funnel-like led into the transitional space 12, there first diverted by 90 ° and then introduced from the transitional space 12 by a new 90 ° deflection from below into the lower inlet opening 15 of the housing 19 of the separator 14. The separating chamber 9 and the transitional space 12 thus form an air path between the outlet opening 3 of the painting booth 2 and the inlet opening 15 of the separating device 14.

Die Abscheidevorrichtung 14 wurde zuvor betriebsbereit. gemacht. Dies bedeutet zum einen, dass an die Gegenelektrodeneinrichtungen 26 die erforderliche Hochspannung angelegt wird. Zum anderen wurden die Zuführrinnen 81 der verschiedenen Zuführeinrichtungen 80 so weit mit Abscheideflüssigkeit gefüllt, dass zumindest der zwischen den Federblechen 84, 85 liegende Raum auf gegenüberliegenden Seiten der Schieberbleche 99, 100 bzw. der Abscheideelektrode 25 gefüllt ist. Dabei wird Sorge dafür getragen, dass dieses Niveau der Abscheideflüssigkeit in den Rinnen 81 dauerhaft aufrecht erhalten bleibt.The separation device 14 was previously ready. made. This means, on the one hand, that the required high voltage is applied to the counterelectrode devices 26. On the other hand, the feed channels 81 of the various feed devices 80 have been filled with separating liquid so far that at least the space lying between the spring strips 84, 85 is filled on opposite sides of the slide plates 99, 100 or the separating electrode 25. Care is taken to ensure that this level of the separating liquid in the gutters 81 is permanently maintained.

Zwischen den unteren Rändern der Federbleche 84, 85 fließt eine zusammenhängend Schicht der Abscheideflüssigkeit nach unten und gelangt auf diese Weise auf die gegenüberliegenden Abscheideflächen der Abscheideelektroden 25. Die Abscheideflüssigkeit fließt als gleichmäßige Schicht weiter auf den Abscheideelektroden 25 nach unten und tropft dann von deren unteren Rändern in den Sumpf 61 des Übergangsraumes 12 ab.Between the lower edges of the spring plates 84, 85, a contiguous layer of the deposition liquid flows down and thus arrives at the opposite separation surfaces of the deposition electrodes 25. The deposition liquid flows as a uniform layer further down on the deposition electrodes 25 and then drips from their lower edges into the sump 61 of the transitional space 12.

Die Abscheideflüssigkeit wird kontinuierlich oder intermitierend aus dem Sumpf 61 abgezogen und durch ein geeignetes Verfahren, beispielsweise durch Filtration, von den Overspray-Partikeln befreit. Sie kann dann zur Wiederverwendung in die Lackieranlage 1 zurückgeleitet werden.The separating liquid is withdrawn continuously or intermittently from the sump 61 and freed of the overspray particles by a suitable method, for example by filtration. It can then be returned to the paint shop 1 for reuse.

Die mit Overspray-Partikeln beladene Luft tritt, wie oben schon erwähnt, in das Gehäuse 19 der Abscheidevorrichtung 14 ein. Sie und insbesondere die von ihr mitgeführten Overspray-Partikel werden im Bereich der Koronadrähte 27 der verschiedenen Gegenelektrodeneinrichtungen 26 ionisiert und im Bereich der Feldelektroden 29 der Gegenelektrodeneinrichtungen 26 in Richtung in die auf Massepotential liegende zugeordnete Abscheideelektrode 25 gezogen. Die Overspray-Partikel werden dabei von der Abscheideflüssigkeit, die von oben über die Abscheidefläche strömt, aufgenommen.The laden with overspray particles air enters, as already mentioned above, in the housing 19 of the separator 14 a. They and in particular the overspray particles entrained by them are ionized in the region of the corona wires 27 of the various counterelectrode devices 26 and drawn in the region of the field electrodes 29 of the counterelectrode devices 26 in the direction of the associated deposition electrode 25 at ground potential. The overspray particles are thereby absorbed by the Abscheideflüssigkeit, which flows from above the Abscheidefläche.

Luft und Abscheideflüssigkeit fließen auf diese Weise im Gegenstrom. Dies hat zur Folge, dass im unteren Bereich der Abscheideelektroden 25, wo die Verschmutzung der Luft mit Overspray-Partikeln am größten ist, auch die am stärksten mit abgeschiedenen Overspray-Partikeln beladene Abscheideflüssigkeit strömt. Umso weiter die Luft sich nach oben bewegt, umso reiner wird sie. Entsprechend wird auch die über die Abscheideelektroden 25 fließende Abscheideflüssigkeit sauberer, so dass die Luft, welche die Abscheidevorrichtung 14 nach oben verlässt, ein Höchstmaß an Sauberkeit erreicht hat. Sie kann dann ohne Weiteres über den Luftkanal 17 und den Sammel-Abführkanal 18 der Rekonditionierung und von dort erneut der Lackierkabine 2 zugeführt werden.Air and separation liquid flow in this way in countercurrent. This has the consequence that in the lower region of the deposition electrodes 25, where the pollution of the air is the largest with overspray particles, also flows the most heavily loaded with deposited overspray particles Abscheideflüssigkeit. The further the air moves up, the cleaner it gets. Accordingly, the separating liquid flowing over the separation electrodes 25 also becomes cleaner, so that the air leaving the separation device 14 upwards has reached the highest level of cleanliness. It can then be readily reconditioned via the air duct 17 and the collection discharge channel 18 and from there to the paint booth 2 again.

Die Abscheideflüssigkeit kann mehr oder weniger viskos sein. Um das Ausströmen der Abscheideflüssigkeit aus den Zuführrinnen 81 an den unteren Rändern der Federbleche 84, 85 vorbei zu fördern, sind die Schieberbleche 99, 100 vorgesehen. Diese werden in entsprechenden Zeitabständen durch Drücken auf die Betätigungsplatte 96 aus der in Figur 4 dargestellten oberen in die in Figur 5 dargestellte untere Position verschoben. Bei jedem derartigen Hub wird ein bestimmtes Quantum der Abscheideflüssigkeit aktiv nach außen auf die weiter unten liegenden Bereiche der Abscheideflächen der Abscheideelektrode 25 gedrückt.The separating liquid may be more or less viscous. In order to promote the outflow of Abscheideflüssigkeit from the feed channels 81 at the lower edges of the spring plates 84, 85, the slide plates 99, 100 are provided. These are at appropriate intervals by pressing the actuator plate 96 from the in FIG. 4 shown upper in the in figure 5 moved shown lower position. In each such stroke, a given quantum of the deposition liquid is actively forced outwardly onto the lower regions of the separation surfaces of the deposition electrode 25.

Ein Betätigungsmechanismus, mit dem dies geschehen kann, ist in Figur 2 schematisch dargestellt und insgesamt mit dem Bezugszeichen 103 versehen. Er umfasst einen auf der Außenseite des Gehäuses 19 angeordneten Getriebemotor 104, der über zwei Gestänge 105, 106 zwei Wellen 107, 108 um einen bestimmten Winkel hin und her verdrehen kann. Die Wellen 107, 108 verlaufen parallel zueinander im oberen Bereich des Gehäuses 19 senkrecht zu den Schienen 36 und den Zuführrinnen 81. Die Wellen 107, 108 tragen drehschlüssig für jede Abscheideeinheit 21, 22 ein Betätigungsglied 109, welches in hier nicht näher interessierender Weise mit einer Betätigungsplatte 96 einer Zuführeinrichtung 80 zusammenwirkt. Ersichtlich ist es mit der Betätigungseinrichtung 103 möglich, alle Schieberbleche 84, 85 in der Abscheidevorrichtung 14 zwischen ihren beiden Positionen hin- und herzubewegen.An actuating mechanism with which this can be done is in FIG. 2 shown schematically and generally provided with the reference numeral 103. It comprises a arranged on the outside of the housing 19 geared motor 104, the two rods 105, 106 two shafts 107, 108 can rotate back and forth by a certain angle. The shafts 107, 108 run parallel to each other in the upper region of the housing 19 perpendicular to the rails 36 and the feed chutes 81. The shafts 107, 108 carry a rotationally locking for each separation unit 21, 22 an actuator 109, which in not further interest here with a way Actuating plate 96 of a feeder 80 cooperates. As can be seen, it is possible with the actuating device 103 to move all slider plates 84, 85 back and forth in the separating device 14 between their two positions.

Von Zeit zu Zeit kann es erforderlich werden, den Innenraum der Zuführrinnen 81 zu reinigen. Dann wird die Kurvenscheibe 91 aus der in Figur 4 dargestellten Position in die in Figur 6 dargestellte Position verdreht, was zur Folge hat, dass die Federbleche 84, 85 von den Abscheideflächen der Abscheideelektrode 25 abheben. In der Führungsrinne 81 enthaltene Flüssigkeit kann auf diese Weise leicht auslaufen; darüber hinaus ist der Innenraum der Führungsrinne 81 zur Reinigung zugänglich. Der Mechanismus, mit welchem die Achse 90 und damit die Kurvenscheiben 91 verdreht werden, ist zeichnerisch nicht dargestellt.From time to time it may be necessary to clean the interior of the feed channels 81. Then, the cam 91 from the in FIG. 4 position shown in the in FIG. 6 rotated position shown, which has the consequence that the spring plates 84, 85 stand out from the Abscheideflächen the Abscheideelektrode 25. Liquid contained in the guide groove 81 can leak easily in this way; In addition, the interior of the guide channel 81 is accessible for cleaning. The mechanism with which the axis 90 and thus the cam 91 are rotated, is not shown in the drawing.

In den Figuren 7 bis 10 ist ein zweites Ausführungsbeispiel einer Zuführeinrichtung dargestellt, mit welcher den Abscheideflächen einer Abscheideelektrode Abscheideflüssigkeit zugeführt werden kann. Die Ausführungsform der Figuren 7 bis 10 ist konstruktiv einfacher als diejenige der Figuren 1 bis 6, leistet aber im Wesentlichen dasselbe. Komponenten der zweiten Ausführungsform, die solchen der ersten entsprechen, sind mit demselben Bezugszeichen zuzüglich 100 gekennzeichnet.In the FIGS. 7 to 10 a second embodiment of a feed device is shown, with which the Abscheideflächen a Abscheideelektrode Abscheideflüssigkeit can be supplied. The embodiment of the FIGS. 7 to 10 is structurally simpler than that of FIGS. 1 to 6 but does essentially the same thing. Components of the second embodiment that correspond to those of the first are designated by the same reference numeral plus 100.

In den Figuren 8 bis 10 sind im Wesentliche identisch wiederzuerkennen das eine Schiene bildende Hohlprofil 136 mit dem Spalt 138 in der Unterseite. Wiederum erstreckt sich der obere Bereich einer Abscheideelektrode 125 durch den Spalt 138 nach oben ins Innere der Schiene 136. Dort sind Rollenpaare 139a, 139b an der Abscheideelektrode 125 gelagert und laufen auf den beiden unteren Flanschen der Schiene 136 ab. Erneut umfasst die Zuführeinrichtung 180 eine Zuführrinne 181, die in irgendeiner Weise mit einer Quelle einer Abscheideflüssigkeit verbunden ist. Die Zuführrinne 181 wird wiederum von zwei Profilblechen 182, 183 und von zwei an unteren Schenkeln der Profilbleche 182, 183 befestigten Federblechen 184, 185 begrenzt. Die Federbleche 184, 185 sind in diesem Falle nicht angeschraubt, sondern angeklebt.In the FIGS. 8 to 10 are essentially identically recognize the one rail forming hollow section 136 with the gap 138 in the bottom. Again, the upper portion of a Abscheideelektrode 125 extends through the gap 138 upwardly into the interior of the rail 136. There are roller pairs 139a, 139b mounted on the Abscheideelektrode 125 and run on the two lower flanges of the rail 136 from. Again, the feeder 180 includes a feed chute 181 which is in some way connected to a source of a deposition liquid. The feed chute 181 is in turn bounded by two profiled sheets 182, 183 and by two spring sheets 184, 185 secured to lower legs of the profiled sheets 182, 183. The spring plates 184, 185 are not screwed in this case, but glued.

Anders als beim Ausführungsbeispiel der Figuren 1 bis 6 sind die Profilbleche 182, 183 unbeweglich und sind an beiden gegenüberliegenden Enden jeweils mit einer Stirnwand der entsprechenden Abscheideeinheit verbunden.Unlike the embodiment of FIGS. 1 to 6 are the profile sheets 182, 183 immovable and are connected at both opposite ends in each case with an end wall of the corresponding separation unit.

Die unteren Ränder der Federbleche 184, 185 liegen im Normalzustand an den seitlichen Abscheideflächen der Abscheideelektrode 125 an.The lower edges of the spring plates 184, 185 are in the normal state at the lateral Abscheideflächen the Abscheideelektrode 125 at.

Auch das Ausführungsbeispiel der Figuren 7 bis 10 weist zwei Schieberbleche 199, 200 auf, die auf gegenüberliegenden Seiten an der Abscheideelektrode 125 verschiebbar anliegen und zwischen unterschiedlichen Positionen verschoben werden können, die in den Figuren 8 bis 10 dargestellt sind.Also, the embodiment of FIGS. 7 to 10 has two slide plates 199, 200 which abut on opposite sides of the Abscheideelektrode 125 slidably and can be moved between different positions, which in the FIGS. 8 to 10 are shown.

Auf den Außenflächen der beiden Schieberbleche 199, 200 ist jeweils ein gewinkeltes Distanzblech 210 bzw. 211 angeordnet, das in seinem unteren Bereich rechteckige, nach unten ragende Vorsprünge 210a bzw. 211a aufweist, die in sich zurückgebogen sind, so dass hier im Ergebnis ein Randbereich mit einer Dicke entsteht, die etwa der doppelten Blechstärke entspricht. Die Vorsprünge 210a, 211a können unterschiedliche oder auch gleiche Abstände von einander aufweisen. Fluchtend mit den Abständen zwischen benachbarten Vorsprüngen 210a, 211a befinden sich in den Schieberblechen 199, 200 sowie in der in Figur 7 dargestellten Position auch in der Abscheideelektröde 125 Fenster 230, die einen Niveau-Ausgleich der auf beiden Seiten der Abscheideelektrode 125 befindlichen Abscheideflüssigkeit ermöglichen.On the outer surfaces of the two slide plates 199, 200 each angled spacer plate 210 and 211 is arranged, which has in its lower portion rectangular, downwardly projecting projections 210a and 211a, which are bent back into itself, so that in this case an edge region with a thickness that corresponds approximately to twice the sheet thickness. The projections 210a, 211a may have different or even equal distances from each other. In alignment with the distances between adjacent projections 210a, 211a are located in the slide plates 199, 200 as well as in the FIG. 7 also shown in the Abscheideelektröde 125 window 230, which allow leveling of the located on both sides of the Abscheideelektrode 125 Abscheideflüssigkeit.

Die oberen, horizontal umgebogenen Schenkel der Distanzbleche 210, 211 sind gemeinsam mit oberen, horizontal umgebogenen Schenkeln der Schieberbleche 199, 200 an Klötzen 212, 213 befestigt, zwischen denen sich die Abscheideelektrode 125 gleitend hindurchbewegen kann. In dem in den Figuren 8 bis 10 rechten Klotz 213 ist eine Mitnahmeöffnung 214 ausgebildet, deren Sinn weiter unten deutlich wird.The upper, horizontally bent legs of the spacer plates 210, 211 are fastened together with upper, horizontally bent legs of the slide plates 199, 200 to blocks 212, 213, between which the separating electrode 125 can move through. In the in the FIGS. 8 to 10 Right block 213 is a driving opening 214 is formed, the meaning of which is clear below.

Die Schieberbleche 199, 200 werden von einer Betätigungseinrichtung 203 auf- und abbewegt, die als Kraftquelle einen hydraulischen oder pneumatischen Kurzhub-Doppelzylinder 215 aufweist. Der Kurzhub-Doppelzylinder 215 ist aus zwei Kurzhubzylindern 215a, 215b zusammengesetzt, die gegensinnige zueinander angeordnet sind und mit ihren Gehäusen aneinander befestigt sind. Die Kolbenstange 215ba des unteren Kurzhubzylinders 215b ist an einem Teil 216 befestigt, das seinerseits fest mit dem Gehäuse der Abscheidevorrichtung verbunden ist.The slide plates 199, 200 are moved up and down by an actuator 203, which serves as a power source a hydraulic or pneumatic short-stroke double cylinder 215 has. The short-stroke double cylinder 215 is composed of two Kurzhubzylindern 215a, 215b, which are arranged in opposite directions to each other and are secured together with their housings. The piston rod 215ba of the lower Kurzhubzylinders 215b is attached to a part 216 which in turn is fixedly connected to the housing of the separator.

Ebenfalls starr an dem Gehäuse angebracht ist eine vertikal verlaufende Führungsschiene 217, auf welcher ein verfahrbarer Schlitten 218 geführt ist. Der Schlitten 218 ist über ein Winkelblech 219 mit der Kolbenstange 215aa des oberen Kurzhubzylinders 215a bewegungsschlüssig verbunden.Also mounted rigidly on the housing is a vertically extending guide rail 217, on which a movable carriage 218 is guided. The carriage 218 is connected via an angle plate 219 with the piston rod 215aa of the upper Kurzhubzylinders 215a motion fit.

Zwischen dem Schlitten 218 und einem auf der gegenüberliegenden Seite der Abscheidevorrichtung vorgesehenen, entsprechenden Schlitten, der in der Zeichnung nicht dargestellt ist, verläuft eine Stange 220, an der mehrere nach unten ragende Mitnehmerarme 221 befestigt sind. Für jede Abscheideeinheit ist ein derartiger Mitnehmerarm 221 vorgesehen. Er greift mit einem horizontal verlaufenden Mitnehmerstift 222 in die Mitnahmeöffnung 214 des Klotzes 213 der entsprechenden Abscheideeinheit ein. Ersichtlich können durch Betätigung des Kurzhub-Doppelzylinders 215 alle Schieberbleche 199, 200 gemeinsam mit allen Distanzblechen 210, 211 auf- und abbewegt werden, wie dies nachstehend noch näher erläutert wird.Between the carriage 218 and provided on the opposite side of the separating device, corresponding carriage, which is not shown in the drawing, extends a rod 220 to which a plurality of downwardly projecting driver arms 221 are attached. For each separation unit such a Mitnehmerarm 221 is provided. He engages with a horizontally extending driving pin 222 in the driving opening 214 of the pad 213 of the corresponding separation unit. Obviously, by operation of the short-stroke double cylinder 215, all slide plates 199, 200 can be moved up and down together with all spacer plates 210, 211, as will be explained in more detail below.

Figur 8 zeigt die "normale" Arbeitssituation. In dieser liegen die unteren Ränder der Federbleche 184, 185 an den gegenübeliegenden Abscheideflächen der Abscheideelektrode 125 an. Innerhalb der Federbleche 184, 185 steht Abscheideflüssigkeit, die, wie beim ersten Ausführungsbeispiel, nach Bedarf nachgeliefert wird, um in der Zuführrinne 181 einen etwa konstanten Spiegel aufrecht zu erhalten. Die unteren Ränder der Schieberbleche 199, 200 befinden sich oberhalb der unteren Ränder der Federbleche 184, 185 und der untere Rand der Distanzbleche 210, 211 befindet sich in noch größerer Höhe. FIG. 8 shows the "normal" work situation. In this lie the lower edges of the spring plates 184, 185 at the opposite lying Abscheideflächen the Abscheideelektrode 125. Within the spring plates 184, 185 is Abscheideflüssigkeit which, as in the first embodiment, is replenished as needed, in the feed chute 181 to maintain an approximately constant level. The lower edges of the slide plates 199, 200 are located above the lower edges of the spring plates 184, 185 and the lower edge of the spacers 210, 211 is located in even greater height.

Um nun das Ausfließen der Abscheideflüssigkeit aus der Zuführrinne 181 bei Bedarf zu fördern, werden die Schieberbleche 199, 200 durch entsprechende Betätigung des oberen Kurzhubzylinders 215a so weit nach unten geschoben, dass die unteren Ränder sich unter die unteren Ränder der Federbleche 184, 185 schieben, wie dies in Figur 9 gezeigt ist. Bei dieser Hubbewegung wird wiederum ein gewisses Quantum der Abscheideflüssigkeit aktiv aus der Zuführrinne 181 nach unten auf die gegenüberliegenden Abscheideflächen der Abscheideelektrode 125 gebracht. Die unteren Ränder des Distanzbleche 210, 211 bleiben aber in einer solchen Höhe, dass sie keinen Einfluss auf die Position und Gestalt der Federbleche 184, 185 besitzen. Zwischen den beiden in Figur 8 und Figur 9 dargestellten Positionen wechseln die Schieberbleche 199, 200 und - im gleichen Takt hiermit - der Distanzbleche 210, 211 hin- und her.In order to promote the outflow of the separating liquid from the feed chute 181 as needed, the slide plates 199, 200 are pushed downwards by corresponding actuation of the upper short-stroke cylinder 215a so that the lower edges slide below the lower edges of the spring plates 184, 185, like this in FIG. 9 is shown. During this lifting movement, in turn, a certain amount of the separating liquid is actively brought down from the feed chute 181 to the opposite separation surfaces of the deposition electrode 125. However, the lower edges of the spacer plates 210, 211 remain at a height such that they have no influence on the position and shape of the spring plates 184, 185. Between the two in FIG. 8 and FIG. 9 Positions shown change the slide plates 199, 200 and - in the same cycle hereby - the spacer plates 210, 211 back and forth.

Wird eine Reinigung der Zuführrinne 181 gewünscht, werden mit Hilfe des unteren Kurzhubzylinders 215b die Schieberbleche 199, 200 mit den Distanzblechen 210, 211 so weit nach unten geschoben, bis die unteren, in der Dicke vergrößerten Randbereiche der Distanzbleche 210, 211 die unteren Ränder der Federbleche 184, 185 auseinanderbiegen. Nun kann die in der Zuführrinne 181 befindliche Abscheideflüssigkeit durch die Zwischenräume zwischen den Vorsprüngen 210a, 211a leicht ablaufen.If a cleaning of the feed chute 181 is desired, the slide plates 199, 200 with the spacer plates 210, 211 pushed so far down with the help of the lower Kurzhubzylinders 215b until the lower, enlarged in thickness edge regions of the spacer plates 210, 211, the lower edges of Spring plates 184, 185 bend apart. Now, the deposition liquid contained in the feed chute 181 can easily drain through the spaces between the protrusions 210a, 211a.

In der in Figur 7 dargestellten Perspektive der Zuführeinrichtung 180 ist eine Besonderheit erkennbar, die auch beim Ausführungsbeispiel der Figuren 1 bis 6 verwirklicht sein könnte: Der untere Rand der Federbleche 184, 185 ist dort nämlich nicht geradlinig sondern zinnenartig ausgestaltet. Die Federbleche 184, 185 liegen somit nur mit den unteren Rändern der zinnenartigen, nach unten weisenden Vorsprünge an der Abscheideelektrode 125 an. Auch diese Maßnahme dient der Förderung des Flusses von Abscheideflüssigkeit aus der Führungsrinne 181 insbesondere dann, wenn die Abscheideflüssigkeit verhältnismäßig viskos ist.In the in FIG. 7 shown perspective of the feeder 180 is a distinctive feature recognizable, which also in the embodiment of FIGS. 1 to 6 could be realized: The lower edge of the spring plates 184, 185 is namely there is not straight but crenellated. The spring plates 184, 185 thus rest against the precipitation electrode 125 only with the lower edges of the crenellated, downwardly pointing projections. This measure also serves to promote the flow of separating liquid out of the guide channel 181, in particular when the separating liquid is relatively viscous.

Claims (5)

  1. A system (1) for coating objects having:
    a) a coating booth (2) in which the objects may be acted upon by coating material and through which an air stream can be guided which takes up overspray particles of the coating material and conveys them away;
    b) an electrostatically operating separating device (14) whereof a housing (19) has an inlet opening (15) for the overspray-particle-laden air and an outlet opening for the cleaned air, wherein at least one separating electrode (25; 125), which has a separating surface, and a counter electrode device (26; 126) are arranged in the housing (19);
    c) a high voltage source, whereof the poles can be connected to the separating electrode (25; 125) and the counter electrode device (26);
    d) an air path for the overspray-particle-laden air, which leads from the base of the coating booth (2) to the inlet opening (15) of the separating device (14);
    wherein
    e) each separating electrode (25; 125) is associated with a supply device (80; 180) that enables separating fluid to be supplied to the upper region of each separating surface of the separating electrode (25; 125) in such a way that the separating fluid flows extensively over each separating surface of the separating electrode (25; 125);
    characterized in that
    f) the supply device (80; 180) has a supply channel (81; 181) which can be filled to a certain level with separating fluid and is formed in its lower region by two spring steel plates (84, 85; 184; 185) which resiliently lie at least sometimes and at least partially with their respective lower edges against opposite operating surfaces of the separating electrode (25; 125);
    g) two sliding plates (99, 100; 199, 200) are provided, which lie displaceably against opposite separating surfaces of the separating electrode (25; 125);
    h) an actuating device (103; 203) is provided, by means of which the sliding plates (99, 100; 199, 200) can be moved back and forth between a position in which their lower edges are located above the lower edges of the spring steel plates (84, 85; 184; 185) and a position in which their lower edges are located below the lower edges of the spring steel plates (84, 85; 184; 185).
  2. A system (1) according to claim 1, characterized in that the lower edges of the spring steel plates (184; 185) have a crenellated shape or resemble a blunt comb.
  3. A system (1) according to claim 1 or 2, characterized in that a device (91, 94, 94; 210) is provided, by means of which the lower edges of the spring steel plates (84, 85; 184; 185) can be moved away from the system at the separating surfaces of the separating electrode (25; 125) to an extent that the contents of the supply channel (81; 181) can run out.
  4. A system (1) according to one of the preceding claims, characterized in that it is designed for painting objects.
  5. A system (1) according to one of the preceding claims, characterized in that the objects are vehicle bodies.
EP11703385.2A 2010-02-09 2011-01-29 System for coating, in particular painting, objects, in particular vehicle bodies Not-in-force EP2533907B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010007479A DE102010007479B3 (en) 2010-02-09 2010-02-09 Equipment for coating objects
PCT/EP2011/000414 WO2011098222A1 (en) 2010-02-09 2011-01-29 System for coating, in particular painting, objects, in particular vehicle bodies

Publications (2)

Publication Number Publication Date
EP2533907A1 EP2533907A1 (en) 2012-12-19
EP2533907B1 true EP2533907B1 (en) 2015-09-16

Family

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Application Number Title Priority Date Filing Date
EP11703385.2A Not-in-force EP2533907B1 (en) 2010-02-09 2011-01-29 System for coating, in particular painting, objects, in particular vehicle bodies

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US (1) US9126221B2 (en)
EP (1) EP2533907B1 (en)
JP (1) JP5833573B2 (en)
CN (1) CN102753273B (en)
DE (1) DE102010007479B3 (en)
WO (1) WO2011098222A1 (en)

Families Citing this family (5)

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DE102012009723A1 (en) * 2012-05-16 2013-11-21 Eisenmann Ag Device for separating overspray and installation with such
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WO2015082522A1 (en) * 2013-12-04 2015-06-11 Thomas Mayer Compressed air treatment chamber
DE102014018903A1 (en) * 2014-12-17 2016-06-23 Eisenmann Se Apparatus and method for separating particles from an exhaust air stream of a coating booth
KR102221735B1 (en) * 2019-05-31 2021-03-03 주식회사 리트코 Variable bidirectional voltage electrostatic filter system in which the distance between the charging part and the dust collecting part is controlled

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Also Published As

Publication number Publication date
EP2533907A1 (en) 2012-12-19
CN102753273A (en) 2012-10-24
WO2011098222A1 (en) 2011-08-18
JP2013518719A (en) 2013-05-23
JP5833573B2 (en) 2015-12-16
US20120304925A1 (en) 2012-12-06
CN102753273B (en) 2015-04-29
US9126221B2 (en) 2015-09-08
DE102010007479B3 (en) 2011-06-22

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